re: Official ICAST 2017 Kayak Thread

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I believe it's the screw that attaches the prop to the shaft. The tighter you adjust the harder it is to push with your legs, but you go faster. I believe it has 3 pitches. I don't understand. How is a screw doing this?

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I believe the screw loosened allows the prop to not spin as as many revolutions as the shaft is spinning allowing for an easier peddling, but less speed. As you tighten the screw the blades spinning will match the shaft meaning more drag, more speed, but harder to peddle.